[U-Boot] Script with 'if run' don't work as expected

[Stefan Herbrechtsmeier]

Hi,

a script with 'if run' don't work as expect. I have test it on an 
omap3_overo board.

The following script always prints true:
setenv testcmd false; if run testcmd; then echo "true"; fi;

This could be fixed by reverting commit 
1992dbfdb9886c3dfc4a505091895c851f736f3a:
Make 'run' use run_command_list() instead of run_command()

Kind regards,
   Stefan